[glass] Add Alerts widget (wpilibsuite#7219)

glass/src/lib/native/cpp/other/Alerts.cpp

@@ -0,0 +1,32 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#include "glass/other/Alerts.h"
+
+#include <IconsFontAwesome6.h>
+#include <imgui.h>
+
+using namespace glass;
+
+void glass::DisplayAlerts(AlertsModel* model) {
+  auto& infos = model->GetInfos();
+  auto& warnings = model->GetWarnings();
+  auto& errors = model->GetErrors();
+
+  const ImVec4 kWarningColor{0.85f, 0.56f, 0.0f, 1.0f};
+  const ImVec4 kErrorColor{0.9f, 0.25f, 0.25f, 1.0f};
+
+  // show higher severity alerts on top
+  for (auto&& error : errors) {
+    ImGui::TextColored(kErrorColor, "%s %s", ICON_FA_CIRCLE_XMARK,
+                       error.c_str());
+  }
+  for (auto&& warning : warnings) {
+    ImGui::TextColored(kWarningColor, "%s %s", ICON_FA_TRIANGLE_EXCLAMATION,
+                       warning.c_str());
+  }
+  for (auto&& info : infos) {
+    ImGui::Text("%s %s", ICON_FA_CIRCLE_INFO, info.c_str());
+  }
+}

glass/src/lib/native/include/glass/other/Alerts.h

@@ -0,0 +1,23 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "glass/Model.h"
+
+namespace glass {
+
+class AlertsModel : public Model {
+ public:
+  virtual const std::vector<std::string>& GetInfos() = 0;
+  virtual const std::vector<std::string>& GetWarnings() = 0;
+  virtual const std::vector<std::string>& GetErrors() = 0;
+};
+
+void DisplayAlerts(AlertsModel* model);
+
+}  // namespace glass

glass/src/libnt/native/cpp/NTAlerts.cpp

@@ -0,0 +1,51 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#include "glass/networktables/NTAlerts.h"
+
+#include <utility>
+
+#include <fmt/format.h>
+
+using namespace glass;
+
+NTAlertsModel::NTAlertsModel(std::string_view path)
+    : NTAlertsModel{nt::NetworkTableInstance::GetDefault(), path} {}
+
+NTAlertsModel::NTAlertsModel(nt::NetworkTableInstance inst,
+                             std::string_view path)
+    : m_inst{inst},
+      m_infos{m_inst.GetStringArrayTopic(fmt::format("{}/infos", path))
+                  .Subscribe({})},
+      m_warnings{m_inst.GetStringArrayTopic(fmt::format("{}/warnings", path))
+                     .Subscribe({})},
+      m_errors{m_inst.GetStringArrayTopic(fmt::format("{}/errors", path))
+                   .Subscribe({})} {}
+
+void NTAlertsModel::Update() {
+  if (!m_infos.Exists()) {
+    m_infosValue.clear();
+  }
+  for (auto&& v : m_infos.ReadQueue()) {
+    m_infosValue = std::move(v.value);
+  }
+
+  if (!m_warnings.Exists()) {
+    m_warningsValue.clear();
+  }
+  for (auto&& v : m_warnings.ReadQueue()) {
+    m_warningsValue = std::move(v.value);
+  }
+
+  if (!m_errors.Exists()) {
+    m_errorsValue.clear();
+  }
+  for (auto&& v : m_errors.ReadQueue()) {
+    m_errorsValue = std::move(v.value);
+  }
+}
+
+bool NTAlertsModel::Exists() {
+  return m_infos.Exists();
+}

glass/src/libnt/native/cpp/StandardNetworkTables.cpp

@@ -4,6 +4,7 @@
 
 #include <memory>
 
+#include "glass/networktables/NTAlerts.h"
 #include "glass/networktables/NTCommandScheduler.h"
 #include "glass/networktables/NTCommandSelector.h"
 #include "glass/networktables/NTDifferentialDrive.h"
@@ -24,6 +25,16 @@
 using namespace glass;
 
 void glass::AddStandardNetworkTablesViews(NetworkTablesProvider& provider) {
+  provider.Register(
+      NTAlertsModel::kType,
+      [](nt::NetworkTableInstance inst, const char* path) {
+        return std::make_unique<NTAlertsModel>(inst, path);
+      },
+      [](Window* win, Model* model, const char*) {
+        win->SetDefaultSize(300, 150);
+        return MakeFunctionView(
+            [=] { DisplayAlerts(static_cast<NTAlertsModel*>(model)); });
+      });
   provider.Register(
       NTCommandSchedulerModel::kType,
       [](nt::NetworkTableInstance inst, const char* path) {

glass/src/libnt/native/include/glass/networktables/NTAlerts.h

@@ -0,0 +1,49 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#pragma once
+
+#include <string>
+#include <string_view>
+#include <vector>
+
+#include <networktables/NetworkTableInstance.h>
+#include <networktables/StringArrayTopic.h>
+
+#include "glass/other/Alerts.h"
+
+namespace glass {
+
+class NTAlertsModel : public AlertsModel {
+ public:
+  static constexpr const char* kType = "Alerts";
+
+  // path is to the table containing ".type", excluding the trailing /
+  explicit NTAlertsModel(std::string_view path);
+  NTAlertsModel(nt::NetworkTableInstance inst, std::string_view path);
+
+  const std::vector<std::string>& GetInfos() override { return m_infosValue; }
+
+  const std::vector<std::string>& GetWarnings() override {
+    return m_warningsValue;
+  }
+
+  const std::vector<std::string>& GetErrors() override { return m_errorsValue; }
+
+  void Update() override;
+  bool Exists() override;
+  bool IsReadOnly() override { return false; }
+
+ private:
+  nt::NetworkTableInstance m_inst;
+  nt::StringArraySubscriber m_infos;
+  nt::StringArraySubscriber m_warnings;
+  nt::StringArraySubscriber m_errors;
+
+  std::vector<std::string> m_infosValue;
+  std::vector<std::string> m_warningsValue;
+  std::vector<std::string> m_errorsValue;
+};
+
+}  // namespace glass